I'd probably switch it to a twenty gal if possible. A ten gal is very limiting in terms of fish choices and a less stable, more difficult setup to maintain.
Then I'd consider these fish:
- corydoras
- bettas.
- a small pleco if with another fish, pleco alone would be boring. I really don't think a kid wants to look at only a single pleco hiding or only being active at night.
- The typical common livebearers
- Cherry barbs.
- Kuhli loaches, (though some people say they need a thirty gal tank)
Then I'd consider these fish:
- corydoras
- bettas.
- a small pleco if with another fish, pleco alone would be boring. I really don't think a kid wants to look at only a single pleco hiding or only being active at night.
- The typical common livebearers
- Cherry barbs.
- Kuhli loaches, (though some people say they need a thirty gal tank)