I have been wanting to switch my almost 6 year old to a booster from a harness seat. We have the Britax Frontier 85 and I was planning to get her a backless booster and put her brother into the Frontier. I purchased the $13 one from walmart that had fabulous reviews from consumer reports. It fits across her lap and chest perfectly but I was a little too freaked out to go from a harness to such a little thing. So, I decided to keep her brother in his seat for a little longer and switch the frontier to booster mode. The only problem is that my daughter absolutely cannot buckle herself into the frontier in booster mode. It has been very frustrating.
I realized the reason she can't buckle herself is because every time I buckle her I pull all the slack out of the belt and lock it in place. If I don't lock the belt in place, she can buckle it just fine. I looked all over the user manual and I can't see anything about the necessity of locking the seat belt into place. It just says to 'remove the slack from the belt.'
So my question is: Is it necessary to lock the seat belt? I know I don't lock mine?
Thanks for any recommendations.