I’ve found a few places online that I’ve used to make customized things for my classroom. For example, the magnets I use for my classroom calendar I designed so I didn’t have to rewrite things, could move them around, etc.
One of the companies I’ve ordered from is called ArtsCow (disclosure – it’s an affiliate link – I will get points from this link toward free product). They are running a deal where you can any three magnets for $5 with free standard shipping for the whole order (code: FRIDGEMAG). They come in all sorts of shapes and you can either upload your own design or make it online.
You can also get things like custom ink stamps on sale (code: OFFICEWORKS) and 35% off any order (code: 35OFFSITE). You can even design your own scarves, hoodies, etc.
So you know, the products are made and shipped from Hong Kong. For some, that’s a deal breaker. Also between production and shipping it can take two to three weeks to get your products. I’ve used them for playing cards, photos, and magnets and have been pleased with the quality.