Not sure exactly were to post this, but this is basically one of those quality of life things I'm asking for.

Is it possible to change Speed to Squares? I know I'm able to simply override a characters speed, but I can't change the "ft." tag. I guess the reason I'm asking for this is because I'm currently run a game for my younger family and a few of their friends (ages 6-12). I guess I'd ultimately like this to be adjustable on weapon, ability, and spell ranges as well. Just putting it out there, not sure if this sort of this is really desirable by other DMs/PCs, and I get it would be best to just teach them the mechanics outright. Well anyway, thanks to anyone who took the time to read this, and epically to the DND Beyond team. You all continue to impress me.

Divide speed by 5. 90% of the time, 1 square represents 5 feet. There are exceptions, but this should cover your basis.

For example, a wood elf can move 7 squares, while a hill dwarf can only move 5 squares. A sword has a reach of 1 square, and a heavy crossbow of 24 squares.

EDIT: Oh you're looking to change the label? My bad. IDK how to help you there, sorry. :/

No way to change the character sheet for now.

It's a good way to learn the 5 times table :-)

PHB pg 192

VARIANT: PLAYiNC ON A GRID
If you play out a combat using a square grid and miniatures or other tokens, follow these rules.
  Squares. Each square on the grid represents 5 feet.
  Speed. Rather than moving foot by foot, move square by square on the grid. This means you use your speed in 5-foot segments. This is particularly easy ifyou translate your speed into squares by dividing the speed by 5. For example, a speed of 30 feet translates into a speed of 6 squares.
  If you use a grid often, consider writing your speed in squares on your character sheet.
  Entering a Square. To enter a square, you must have
at least 1 square of movement left, even ifthe square is diagonally adjacent to the square you're in. (The rule for diagonal movement sacrifices realism forthe sake ofsmooth play. The Dungeon Master's Guide provides guidance on using a more realistic approach.)
  If a square costs extra movement, as a square ofdifficult terrain does, you must have enough movement left to pay for entering it. For example, you must have at least 2 squares of movement left to enter a square of difficult terrain.
  Corners. Diagonal movement can't cross the corner of a wall, large tree, or other terrain feature that fills its space.
  Ranges. To determine the range on a grid between two things-whether creatures or objects-start counting squares from a square adjacent to one ofthem and stop counting in the space ofthe other one. Count by the shortest route.

EDIT: I put all that without actually reading, my bad. I actually don’t use DnD Beyond for character tracking, I’m of no help at all :/

People should adapt to the world, not the other way around.

See it as a learning opportunity for the kids.