These Pre-Assembled Fun Science Jumbo Sensory bottles are your solution to endless Fun! These large non-breakable bottles stand on their own, and the lids can be hot glue sealed. Create the bottles once and never have to replace them again. Bottles come with ingredients PRE-ASSEMBLED, Simply add water! (100ml to be exact). We also provide Empty Jumbo Sensory Bottle sets with an activity guide with ideas on how to create your own Fun. The Jumbo Sensory Bottles are a great addition to the sensory section of your science center (The set includes five bottles with natural multi color pearl powder in each). Scientific Skills: Observing, Exploring, Predicting and Draw Conclusion. Recommended age 4-8 years