Montessori: Operating a Dropper Activity Perfectly sized large eyedropper for little ones to master a dropper while building fine motor skills. Convenient stand keeps tubes in place. Features 2 sturdy plastic test tubes with easy on/off caps, 24 color tablets (assortment of red, blue, yellow), sponge, eyedropper and tray. Stand measures 4.75L x 4-1/2W x 2-1/4 H Tray measures 9-5/8 x 6-5/8". Colors of tray may vary from that pictured.