Balls (specifically balls that are small or have a smooth outer coating)

Batteries

Bread twist ties

Buttons

Coins

Cotton swabs

Glass

Hair pins and hair ties

Jewelry

Nylons (pantyhose)

Paper clips

Plastic wrap

Socks

Rubber bands

Sharp objects (knives, razors, scissors, nails, needles, etc.)

String/yarn/dental floss

Towels

Wax