MarsSeed [1] filed a deletion request for childsplay [2]:

Former maintainer disowned the package after my query regarding the need to keep this build alive or not.

It seems this Gtk2 and Python 2 based application has been discontinued 4 years ago, in 2018.

Package is defunct because of missing key Python2 based dependency.

So I suggest to delete it.

[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/childsplay/