Car seat covers:
Same baby... still has aftermarket strap covers, and now an aftermarket toy.
If your child was injured in a crash due to an aftermarket part causing the car seat to not function properly, this typically voids the car seat's warranty.
Now, as to back up my claims, here are some statements from different car seat manufacturers.
"Dorel Juvenile Group does not recommend the use of any car seat accessories except those recommended by the car seat manufacturer." -- This is the company that made the car seats Grace and Brentley have.
"The use of non-Britax Child Safety, Inc covers, inserts, toys, accessories, or tightening devices is not approved by Britax. Their use could cause this restraint to fail Federal Safety Standards or perform worse in a crash. Their use automatically voids the Britax warranty."
"DO NOT use accessories or parts other than those provided by Graco. Their use could alter the performance of the car seat."
"DO NOT attach additional padding, toys, or other devices not made by Evenflo to the child restraint. Items not tested with the child restraint could injure the child."
More of these statements can be found at the link below...