Some ideas to start with . . .

Sticky back Velcrow

Bubbles

scissors 

Colored Paper

Baby dolls and accessories 

Toy cars and trucks

Fisher Price people and accessories

Glue

Stickers

Stencils

Vocabulary flash cards

Number/Math flashcards

Musical instruments

Sports equipment

Puzzles

Books in Spanish

Time telling material

Markers

Pencils

Tempura paints

Masking/clear packing tape

Thumb tacks

Staplers

Hole punchers

Rulers

Notebooks

Slinkys

Playdough

Cookie cutters

Small Rolling pins

Kitchen utensils

Cooking utensils

Craft material

Baby toys

Toys that light up and make noise

Animal figurines

Erasers

Small White boards

Small Chalk boards

Magnet boards

Magnet letters/figures