Well, there is a Greek tinker toy font you can purchase and there is also a font called tinker toy. If you know how to use Inkscape, you can probably make these letters yourself.
The others look like they could be a modified "Curlz" font.
SCAL1, SCAL2 V2.044, SCAL3. SCAL4 XPsp3, Windows 7, Windows 10-64 bit, Ink.46, Cricut E, Silhouette Cameo ***My files are not to be sold and are for personal use only.***
I just looked at fontspace.com and there are several free Greek fonts...Olympus looked like you could just had the circle/oval dots to the ends and use UNION in SCAL to make the one that you like.