Remove scuff marks. Rub a tennis ball on a wood floor to erase scuff marks. Those stubborn black lines will transfer to the ball’s felt almost magically.
Open jars. Split a ball in two by cutting along the white line, then use each half for opening stubborn jars. The rubber interior provides an extra-solid grip.
Protect outdoor padlocks. Keep a lock from rusting from exposure to rain or snow by cutting a slit in a tennis ball and slipping it over the top.
Improvise a rubber mallet. For home projects that require a gentler touch than a normal hammer, slice an X into a tennis ball and push the head of the hammer inside.
Keep your bike upright. Poke a hole in a tennis ball, stick it on the bottom of the bike’s kickstand, and it’ll provide better support on surfaces like grass or gravel.
Source: Woman’s Day