If your kitten peed on your daughter's bedding before, it is possible that it hasn't been properly eradicated so was attracted there again.
There are other possibilities: for example, some laundry detergents are perfumed and have been reported to attract cats to pee, and some laundry preparations contain bleach and bleach is notorious for attracting some cats to pee. So check that this is not the case. Additionally, keep the covers on beds smooth, even consider putting a sheet over the top and tucking it in...rumpled soft bedding can feel right to a cat as a place to pee. And so keeping it smooth can help with this. Of course that is hard if the kitten pees there when someone is sleeping in the bed. You might need to keep the kitten out of your child's room for a few weeks until the kitten is more faithful with the litterbox.
For a kitten, consider things like how far a litterbox is from where they have peed. In a larger house, it can be too big and confusing for a kitten so you might need to consider multiple locations for the first few months.
Was this kitten raised in a house or in a caged cattery situation....? It just may be very confused about things if not raised in a home...