You could visit following places:
EOD adventure park
Sahajanand musical fountain show.
East Delhi is also near to Noida,so you can also explore the following:
Worlds of wonder
DLF mall of India
Cafe Wink is beautiful. There are plenty of things to do in East Delhi. You can visit the Malls, do the shopping from weekend markets.
You can go for bowling, akshardham, cafes like wink and goosebumps.