The Animal Lengths/Weight Addition Top-It game has students adding two-digit numbers with and without regrouping. This is a two player game. The students either choose the length cards or the weight cards. (These are two separate games.) The students shuffle the cards and place them face down in a stack. Each player draws two cards and puts them face up on the table. Each player adds their lengths or weights, and the player with the highest sum takes all of the cards. Play continues until all the cards are gone. The player with the most cards wins the game.