Kids will be delighted to witness these water expanding toys in action Festive Christmas Grow 'Em toys expand up to six times their original size when you place them in water and they make surprising Stocking Stuffers Choose from a sweet Christmas Elf Grow 'Em toy in a traditional green elf costume or go for a jolly Santa Grow 'Em toy. Both characters have adorable cartoon-like facial expressions and will start out small, then grow when you leave them in water for 72 hours. You can put these expandable toys in a bathful of water or in a bowl on the table and come back to check on their progress. They are made from a safe and soft polymer that grows bigger as it absorbs water. Order these water expanding toys as Christmas gifts or to go in a take home gift bag for a children's Christmas party. Teachers can give out these Christmas water expanding toys as prizes in a class party or use them in a Science experiment Teachers, parents and grandparents will enjoy watching their kids try and figure out how the Christmas figures are growing What exactly is happening to these toys and will they go back to their previous size when they dry out? You'll have to try it and find out Product Specifications: Approx. Dimensions (Packaging): 4 (H) x 3 (W) x 6 (D) cm / 1.3 (H) x 0.9 (W) x 2.2 (D) inches.