One of our daughter's favorite board games. We have given it as a gift to her classmate who is 4.5 years old and to her cousin who is 5.5 years old, and they have also loved it.
It has simple rules, but many twists. Behind the board, children can put the crystals to count them and find the winner. There, we ask questions like "how many more crystals do you have than dad" or "how many more do you need to win".
Overall, an excellent and economical choice.