LEGO Creator 3-in-1 Tropical Toucan Building Set

Creator 3-in-1 is where kids learn that a finished model is not the end of a set. Build the toucan first — the beak and tail shaping are the fun part — then break it down for the tree frog, then the butterfly.

At under ten dollars this is one of the cheapest ways into the 3-in-1 idea, and the three animals are different enough that the rebuild feels like a new set rather than a rearrangement. Instructions for all three are in the box.