Go and have fun
Well this is my favourite place to visit in Kolkata during the vacations or breaks. With family or friends it's the best place to hangout and have fun.
With the collosal science museum to the prehistoric dinosaur museum or the 3D shows or the garden outside with the ropeway it's a total package deal. No other place to look around if you are low on budget yet you want to have fun and if you are a nerd it's a heaven for your soul.
Go and have fun. Oh and be careful don't get lost in the mirror world !