I need help with Booster seats......

My family has "adopted" a family for the holidays. Dad is in prison, mom is 23, kids are 6, 3 and 17 months. The 6 year old and the 3 year old need Booster seats. Their van has lap/shoulder belts. I got the 6yo a Graco Turbo Booster backless, but I'm unsure about what to get the 3 yo. Any thoughts? I understand the 17 month old is ok in a convertible.
Thanks!
Kristen

[sarsah]

Honestly, even if the 3 year old is big enough for a booster, he/she would probably be better off in a harnessed seat for now. Sometimes I think my 4 1/2 year old isn't ready for a booster <lol> because he's moving around so much. His main seat is a Britax Super Elite (old version of the Husky), but we use a Turbo Booster when we ride in any car other than my mini van.

Maybe a combo seat (one that is harnessed and then a booster) would work best for this child.

Sarah.....mom to Jason (5/25/00) & Devin (5/12/03)