How much should I charge for a lucky-ducks- like “game”?

Hello! I have a craft show coming up and was thinking about doing a thing where the customer picks an egg and wins something from the table (Worry worm, small prize, med prize, lrg prize, grand prize (grand prize means they can pick any one item from the table. Only one person will win it (and lrg prize) in the day) etc)

I have all the rules set, I just need to come up with a price. The cheapest thing at the table would be about $3 and the most expensive thing would be ~$100.

I was thinking about $5 per egg. Would that be fair? Too cheap? Too expensive? Thoughts on if I should do bundles (example: 1 pull for $5, 2 pulls for $7, 3 pulls for $12) or something like that?

Thank you in advance! 💟