Summer is full of fun events! But sometimes it's hard to play outside due to the daily heat wave. In such cases, how about playing with ice at home? You can easily make a big block of ice by using a milk carton that you have finished drinking.
You can also prepare an ice tray from a store such as 100 yen uniform for ice play.
You can put your favorite mascot or super ball in the water and freeze them together. (It is also beautiful to freeze colored water with paints mixed in.)
It would be fun to melt them in the bath. It is recommended for home time on a hot day.