Liquid Timers are a fantastic resource for those with special needs. This liquid oil drop timer has a twist in the centre and two rolling wheels to add interest. In a variety of colours, the Twist oil drip timer is mesmerising to watch as well as calming. Available in: 1. Blue liquid with dolphin picture on rolling wheels 2. Yellow liquid with smiley face picture on rolling wheels Height: 15cm Warning: These products are made from acrylic plastic. They will not withstand being thrown or dropped onto hard surfaces. They contain mineral oils which may smell strongly if the product breaks. The contents are not toxic and are approved to Australian safety standards, however please under supervision to ensure safe use of the product.