Sensory poppers are all the rage right now - so let's make one! Slide to join these pieces into place. Build your own design or copy one of the 40 included design cards. Requires using 2 hands to manipulate the pieces and design copy. Includes 30 poppers in 6 colors, and 20 two-sided design cards (40 puzzles total). Plenty of pieces for 1-3 players to get their pop on!