My friend Wishy (thanks again Wishy!) told me about these Guidecraft toys. They are giant magnetic rods and balls. Kids can make cool structures without danger of choking on or swallowing little rods and balls like those found in the sets for older kids.
This seems like a great construction toy for younger children, or for households with a baby who constantly seeks out tiny objects.
There sets with different numbers of pieces to fit different budgets. I have shown here the set for ages 3 and up. But there is also a toddler set, and a slightly smaller-sized set (but not choking-sized small) for older children, ages 4 and up.
For more variety, you can even get curvy Magneatos and glow-in-the-dark sets too!