samosas, mildly spiced, are fun. cos they're triangles. who wouldn't want to eat a triangle!?!
and... what about really small vegetable bhajis or pakoras, renamed 'spacerocks'?.
things on sticks are fun for kids too... you could do some dry rubbed veggie skewers.
mini popadums with a cool cucumber mint raita, and a vegetable salad, and a tomato relish would be cool for dipping as well.
and you could do lassis, and spicy matchstick crisps, bombay mix, kulfi (indian icecream), a big fruit salad.... loads of options.