The largest smartmax magnetic set I combined 3 different sets in 1. It let to build you the unbelievable constructions and to have so many variations as you could imagine. The magnetic building sticks set is made of High-Quality ABS Plastic, Natural permanent magnets, all parts are larger than 3cm(1.18") and round edges make it safe for kids to play with The best building set for kids from 9 months The Sticks are big enough to hold with little fingers and the balls are big enough that your baby won't be able to swallow them. It's safest and your baby could play independently to learn color and the magnetics. The magnetic details are very strong to hold the high constructions. I collected this building set for years, my boys played from 1 to 6 years learning 2D and 3D figures. There are also the power machine set and the curves details. I have two instructions books. The gray balls are from old set and some of them are rusted (see the picture) because they were traveled with us, my kids played everywhere but these balls didn't like the sea water. They are still strong but will be more suitable for the kids who does not lick everything. The white balls are like new condition I can send it without box and it will weight less. Gently used from a smoke/pet free, clean & healthy home 😊