Let's Explore The Airport

The Good
To begin with (and expand later), the whole "Let's Explore" (mini)series are not really games - a more precise name would be "interactive themed encyclopedias for children". In this particular installment the theme is "airports and air transport". We move through the area just like in Humongous Entertainment games - by clicking arrows that show up in places where we can go to the next screen - however instead of doing tasks, we can freely explore the area, learn something and also get an occasional laugh from some funny animations.
The drawing style is very clean and different from other HE games (OK, let's unprecisely assume these are games too) - the slightly paint-like graphics of the earliest games (such as the first two Putt-Putt games or "Fatty Bear's Birthday Surprise"), the most common, more cartoon-like style of later Putt-Putt, Freddi Fish or Pajama Sam games, or the deliberately slightly "dirty", "sketchy" style of Spy Fox games. It's characterised by thin, sharp outlines, a meticulous attention to detail and mostly simple shading. Very clean outlines make it easier to show all the details such as lots of controls inside a plane's cockpit.
The whole game, or encyclopedia, contains many of the trademark HE animations. If the arrow is transparent, there's nothing to click, but if it becomes white - the particular element is interactive and a funny animation can be triggered. Some are very simple - something moves and that's all - but some are interesting and funny. A seal jumps out of the water and does a trick with someone's suitcase, a drawing of Putt-Putt appears on a piece of paper inside the control tower... In some cases clicking on parts of the scenery may also be necessary to discover some objects or to gain access to another place, for example to open doors.
I suspect a conscious decision to make the game gender-inclusive. It's done in a very non-preachy, rather subtle way: the images next to the entries for "pilot" and "marshaller" (a person who helps manoeuvre a plane on the ground by giving signs to the pilot) both show women and the entry for "flight attendant" shows both a man and a woman - even though the stereotypical, often sexualized image is a woman, necessarily a young and pretty one (on some airlines female flight attendants can't even wear pants!). Such images can do more than words: they influence children's awareness, show them that career choices are not limited by gender. It's a welcome decision in a world where female pilots are still few (especially in commercial aviation) and often greeted with hostility.
Apart from the "encyclopedic" part, the whole program also includes minigames. "Coloring" and "Find It" are based on the same principle as in other parts of the series, "What Is It" is rather boring, "Trivia" is a very nice quiz, and "Lost Luggage" is by far the best minigame in the whole series. A funny thing is that when I first played it, I didn't know "Pajama Sam's Sock Works yet, and it's based on the same idea, pretty much a remake of "Lost Luggage". That said, there are differences between the both games. Some levels of "Sock Works" were directly taken from "Lost Luggage", but SW also have an extra function not found in LL - dyeing. You can change the color of Sam's socks in some levels, but you can't change the color of suitcases, so if LL was viewed as a remake of SW (which is of course wrong because "Let's Explore the Airport" is earlier), some levels couldn't be "imported" to LL. However, the chances of completing all levels of this minigame are marred by a serious design error I will describe in "The Bad".

The Bad
The game is not really very comfortable to play. It's possible to say there are two "modes" of interacting with any screen. The normal arrow is used for clicking things to discover those animations I described earlier. When you want to look for explanations, you have to click the "What is this?" button and the arrow will change to a question mark. However when you go back to the screen after reading an entry, you have to click this button again to look for other entries.
Getting (a bit) lost is possible. Many entries are connected to others by links and there are two ways of going "back to the game": the "Back to the airport" sign at the bottom of the screen takes you back to the last screen, but clicking the large arrow that appears at the top leads to the screen where the particular object appears. This is useful - sometimes you move between entries and would like to know where a particular object was found, but it's also an opportunity for getting lost and wasting time on going back to the last screen. Navigating this system requires a bit of getting used to.
The disparity between levels of technical accuracy is sometimes striking. Some entries are very simple, written in what we typically associate with a language comprehensible for children. Sometimes these entries are even not very precise. On the contrary, entries for particular models of aircraft are very detailed, for example an airplane is shown with many elements highlighted, such as slat, aileron, fin. Sure, it is interesting, but it's a bit as if the designers couldn't decide if the game is made for quite small children or for older children already interested in engineering.
It seems that "Lost Luggage" has 99 levels, not 100 like "Pajama Sam's Sock Works". However, completing the last one is nearly impossible. One of the elements for moving luggage are chutes - the suitcase drops into a chute and pops out of another chute marked with the same symbol. If there are more than two chutes with the same symbol, the suitcase moves to a default one (if more than one direction is possible, you can't control the direction the suitcase will take either). That's exactly the problem of the final level: each suitcase has to go into the right bin, but the chances that some will pop out of the wrong chute are very high. As the Humongous Wikia describes it, "you can only win the game by chance with the odds against you".
This is precisely what I call "a nasty game". A very bad idea from the designers. Completing a whole game produces a feeling of satisfaction and depriving players of that possibility is even worse in case of games for children. The child may just feel being cheated...

The Bottom Line
As I already said, it's not precise to describe the whole "Let's Explore" series as "games". They aren't games in the ordinary meaning of this word, there are no tasks to complete, they have no plot, only a theme that connects all elements. In this case the theme is "air transport", in the others - "farming" and "rainforests". It's really a pity the series wasn't continued - I guess anyone with a bit of imagination could propose themes for more "Let's Explore" games straight away.
Anyway, even adult non-specialists can learn something from the "encyclopedic part" and I would even say that "Let's Explore the Airport" is worth trying out for the "Lost Luggage" minigame alone. It's not just a game for children - later levels of "Lost Luggage" can be challenging for players of any age.