Like others said... the question is if she enjoys it or you push her. Hothousing is when parents sit their 3 month old in a baby chair and show them flash cards. Hothousing is when a toddler gets a bite of food when she points to the right letter. Hothousing is pushing it down their throats and using various methods to get them to do it.

Here is a link where someone answers the same question...

gifted children vs "hothousing"

I understand your concern. I was really worried about the same thing. I finally learned to relax about it and go with my daughter's flow. (Right now I am homeschooling my DD. She is doing K and 1st grade work right now although she is only 3 yrs. BUT! It's what SHE wants to do.)