The Nintendo Amiibo Figures are small figures based on different Nintendo characters. The child puts them on the remote and they are able to come alive in the game. Most games that they work with can be played without them but they are a great way to enhance the game.
If you have children, you should show them the different characters to see which ones they would want to have the most. Different kids would pick different figures. If you are planning to buy these as a gift it would be a good idea to know what the kids want.
It might be fun to collect all the characters to have different types of gameplay. Different characters can do different types of things in the games. If your kids are into the characters they could tell you what each of the different Amibos can do.
You want to make sure that you do have some of the games that use them. If not, you will need to buy at least one. Figure out what game would be the most fun or what game your kids have their eye on. If you can afford it you can get more than one.
Some games use the Amiibo characters more than others. This could be a factor in what you want to buy as well. Figure out what game would be best based on what your kids want to use the Amiibos for. That way, they can have the most fun with them.