Two 1965 Parker Brothers versions of this game exist, though both are labeled Item 400 and the boxes are identical.

The game box for each version contains:
1 burgundy base board
3 clear upper level boards
12 posts
20 tokens in each of three colors (red, yellow, light blue)
small rules sheet

Version 1.0 uses simple posts that have a +-shaped cross-section to support the game-board levels. The plastic post does not flare out at the top and instead of having a shaped post receptacle on each board, there's just a round area that the post fits into.

Annoyingly, the 1.0 levels do not have recesses for the game tokens. If the cat or the toddler taps this board setup at all hard, the game will be over.

The 1.1 version has orientation-specific posts to go between the board levels. At the bottom of the post, the shape is simple, but at the top, there's a flared base that supports the board nicely. The posts do keep the same +-shaped cross section, but the post receptacles are actually shaped to fit the posts. Unfortunately, that flare and the shape of the post receptacle make for a tighter fit, which sometimes makes taking the board apart a bit more difficult. Be careful that you don't break these pieces... they are now 45 years old!

Each of the 1.1 levels includes small round depressions for the game pieces. While the pieces don't sit into these depressions tightly, there's definitely enough of a recess to keep the tokens from going flying if someone accidentally taps the board.