OK the Nikon P90 does have a f2.8 aperture, so its reasonable fast for a P&S, however, it falls short with image quality on the couple of reviews I've read, especially with heavy noise reduction softens images and smudges details, tends to slightly overexpose and has poor low light focusing which would be a must for you indoor shots. So personally I wouldn't recommend this camera.
Major problem with P&S or Bridge Camera's are although they advertise 50-6400 ISO ranges, most work between 50-400 in good outdoor light and at best up to 200 in indoor light, most have 2.8-5.6 lens ranges due to the zoom, you need a minimum of f2.8 or faster for indoors and preferable a usable ISO range greater than 400.
You want to take images of motion, indoors, which will require fast time to focus to take the shot, and you really are talking about a DSLR for this, P&S and Bridge cameras just don't come up to scratch, they take too long and what you would get is just a blurred image.
My advice is to save you money and not buy something that just won't do the job which the Nikon won't.