Greek Alphabet Play Doh for  

Η is like H (which resembles the latin H)
Θ is like Q (which has the circle and line)
Λ is like V (which resembles the latin V but upwards)
Ξ is like J
Υ is like Y (which resembles the latin Y)
Χ is like X (which resembles the latin X)
Ψ is like L
Ω is like W