To answer your question, a tray has 24 sealed 3 inch figures. In each tray has 2 of each of the pictured figures, a 3rd of one as a filler and there is one rare figure known as a chaser, those tend to sell for $40+ on the secondary market. There is a total of 24 figures per tray and they retail for about $9.95 a box. Keep in mind with this particular set there are certain figures that you could end up with in a sealed tray. You will get one chaser but you will not know which you end up with until you open it.
This particular set has 4 different possible chasers all depicting the pink elephant from Dumbo, the Elephants on Parade segment:
-Clear Pink (most common)
-Solid Dark Pink (uncommon)
-Solid Light Pink (Rare)
-Clear Purple (Rarest)
In addition the Pinocchio figure could have a possible variant:
-Donkey (Common)
-Real Boy with blue ears (Rare)
They are collectable, you can trade the spares at the parks, there are sites out there dedicated to them. There are figures based on the Parks, Muppets, Toy Story, Nightmare Before Christmas, and many other endless themes. This set you actually can tell what is in the box without opening them, there is some sort of code, I'm not entirely sure how people do it but I heard it is possible. Congrats on the nice find.
