I bought these for my 3 1/2 year old grandson and they have become his favorite, go to toy! (We now have a set at his house and mine!). He loves building with them and will spend hours creating all sorts of castles, houses and playgrounds. The magnets are strong, and they’re very colorful and sturdy, holding up to being knocked over and even stepped on. They’re great for outdoor play, too; adhering to metal garage doors; and can easily be packed up for travel, although they are a little heavy due to the magnets. (Note - the set I purchased did not come with any kind of bag or case, but don’t let that deter you from purchasing!) I would highly recommend these and anticipate we’ll be playing with ours for years to come. I can see adding to his set as he gets older and his building becomes more complex!