diy telescope.

You can get a mirror set very cheap on ali, eg https://www.aliexpress.com/item/1005005098614936.html

You'll need to buy an eyepiece or two, and hardware, bolts, etc, but everything else can be made or 3d printed.

I designed and made, with my kids, a 76mm 'cheapscope' using PVC pipe, 3d-printed mirror-holder, spider. focuser and camera-tripod connector, here: https://imgur.com/a/cheapscope-4KtPgoN

I meant to post the 3d-print designs but haven't got to it, let me know if you're interested.

For sure it's not the best scope (or design) ever (and the 3d prints warped a bit), and no phone/camera eyepiece mount so the pictures are shaky, but it works, it was fun, and opens up a new world(s).