My son uses a weighted hat at school it helps him be more focused and he hits less and likes the pressure on his head. I made him a new hat for picture day. If he likes it I will probably hot glue it instead of duck tape. :P
This is what you need
A hat, with room under the hat, shower curtains for their weights, duck tape and scissors.
First cut out the weights from the shower curtains. It took 4.
Tape them on the inside of the seam in the hat