A few days too late, or a rare German non-baby joke: unzip HPFSTL17.ZIP, view HPFSTOOL.EXE with E.EXE, scroll down and remove the "damaged"/"filled" middle section of the eggshaped ASCII art. You should see a few tools.
Or execute this Rexx script in the directory of HPFSTOOL.EXE, and open EASTER.EGG with E.EXE (and a non-proportional font). The script does not remove the "damaged"/"filled" middle section of the eggshaped object:
/**/
all=CharIn('HPFSTOOL.EXE',1,147476)
CALL CharOut 'HPFSTOOL.EXE'
PARSE VAR all . 'Green=Bitmap' rest
CALL CharOut 'Easter.Egg',rest
CALL CharOut 'Easter.Egg'
EXIT
Or open the attached file (21 kiB) with E.EXE, to not have to download and process HPFSTOOL.EXE. Use E.EXE, do not use TYPE.