Hey all, I have this car and the Crayons fit. I did my own little experiment this morning. After seeing this thread yesterday, I went to my local art and teacher supply store and purchased three boxes of the same Crayons that came with the car. The 64 pack.
My findings after going thru each box:
Box 1: All fit
Box 2: 50 fit
Box 3: 15 fit
By fit, I mean no force or wiggling necessary. They slid right in as shown by Lionel. The ones that didn't fit were close, but would have taken considerable force. I need to find my small calipers to see what the difference is between fitting and non-fitting crayons.
I made sure all three boxes I purchased had the same part/sku number from Crayola.
One more observation: Box 1 and 2 had the same date code. Box 3 had a different date code.
Maybe there's a tolerance issue with the Crayon manufacturing?