My 4 year old daughter LOVES these boxes! I was worried about getting the Junior box that they may be too "easy" for her as a 4 year old (since it's listed for 2+), and even considered getting the Discovery Box for 5+, but we are very happy we stuck with the Junior Box. There are parts of the projects she can do alone if I read her the instructions, and others that require my assistance, which is great as it makes it a fun thing to do together while she is also getting time to learn and figure things out independently. We're very pleased with this subscription.