O hA, wLcome 2 thS trope's sLf dMNstrating RticL.
Sometimes lNguages have s2pid rules R regulay-shNs that make U think "who the hL came up with thS?"
ThS trope happNs wN a lNguage S just plain laZ.
Puns R usually formed by taking 2 sMilR-sounding words and using thM 2 subvRt expectay-shNs. Some words, howevR, R so simple that thA sound basically identicL 2 something kids learn N preschool.
2 make thS kind of joke, take a wRd that sounds like a lettR and replace the wRd with that lettR. AltRnativelE, thS cN wRk with wRds that sound like numbRs S wL. ThS kind of joke S much easier to pull off in meed-E-uh tRgeted at little kids, S their vocabulair-E S usual-E limited 2 just lettRs, numbRs, and sMpL words, and therefore it's seen S peak comeD by thM and more likelE 2 get laughs.
Subtrope of Fun with Homophones. Compare Heh Heh, U Said "X".