Need to make something fairly simple and quite small for an engineering "show and tell", any ideas?

I only have about a week to make it or:I only have about a week to make itor:A simple hydraulics set up with syringes, plastic tubes and coloured wate

I only have about a week to make it

or:I only have about a week to make it

or:A simple hydraulics set up with syringes, plastic tubes and coloured water? You could hook it up to a series of pistons or plates and demonstrate hydraulic lifting force.See: www.instructables.com/id/JCB-from-syringes/

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