Hydrophile

The official meaning of hydrophile: a molecule or other molecular entity that is attracted to water molecules and tends to be dissolved by water. I shall conveniently remove the later half and keep the first half referring to the newer love of Samyak.

He loves to drain water into multiple vessels / containers (some being glass, mugs, pressure cookers, water bottle of his brother et al). The source could be the drinking water container, taps (from anywhere, yes from anywhere), any basin, bathroom buckets; yes, from ajywhere. 

This activity is extended to all containers of the washroom every time he goes for a leak. Mind you, I am not including the patting or wading of water during his bath. The containers can't just sit and contain water; water is shifted  (read poured) to another container and sometimes to a series of containers depending on the degree of freedom in his mind, point of attention of his mother and lack of other attention diverting elements in the environment. Needless to say, some leaks in the pourings and transfers ensure creation of mini to decently distinct water puddles across the area. I cannot write floor areas because puddles can be formed on newspapers, tables, bags, magazines, books, bed et al.

If the activities till now seem silly, here's more: Ferraris, bikes, planes, pencil stubs, pen caps also get a dash of wash amidst some of the water transfers.

I must confess,  I racked through Biology for getting the appropriate word and found this one closest.