Pricing is not a guessing contest. A parent and young Maker can use a small worksheet to understand the real cost and then test a fair pilot price.
Count the direct materials
List the beads, thread, charms, card, wrapping and any other material used for one finished creation. If a packet makes ten pieces, divide the packet cost by ten.
Notice time and failed attempts
Handmade work takes concentration and practice. You do not need a complicated hourly-rate formula for a first pilot, but do record how long a good-quality piece takes and how often materials must be replaced.
Keep sets easy to understand
If two or three pieces use shared packaging or repeat the same setup, a set price can be lower than buying each one separately. Make the total clear so a buyer never has to calculate it.
Review after real orders
A pilot price is an assumption. After a few orders, ask whether the materials, time and effort were estimated correctly. A fair price should support the Maker without surprising the buyer.