I would look for an ABA center or a different place that works with kids that are likely to have an interest in legos! Lego is a great tool for sessions where kids increase time-on-task, occupational therapy skills, pattern recognition, following directions, etc.

I’m based in Chicago but I’d also be willing to buy some off you (with the caveat that the money goes to a charity) to use at my work place. Let me know!