Collect or scatter several paper cups and load the pistol with Ping-Pong balls for designated times (ex: 3 times). Shoot the Ping-Pong balls. Each paper cup has its own score. Add the scores of the paper cups where the Ping-Pong balls get in and make a rank.
STEMBrick 乒乓球槍
HK$150.00 一般價格
HK$100.00銷售價格