Funnel Fountains

A new idea for the sand and water tray, or simply fun to be had outside. It takes collaboration to get the job done and the height of the fountain maximised. What shall we use to pour, how can we improve our fountain? Will the diet coke and mentos test work in it?! Endless investigations and tinkering to be had. L 50cm. W 30cm H 17cm. Some self assembly required. Rec 3+ Yrs.