FOAM FINGER is made by splicing WHITE WALLPAPER and POINTY SIGN. FOAM FINGER is in hand category. Plant it and come back tomorrow, unless you want to spent ridiculous amount of spray. Breaking this block will give you 10 experience points. How many times you need to hit it? Head to the wiki for more info: <a href="https://growtopia.fandom.com/wiki/Foam_Finger">foam finger</a> Seed mathematics is very complicated, but you should get at least 1 seed back from splicing FOAM FINGER. Profiting with this might be questionable. Will you get enough blocks to build something? You just have to find out yourself.