Here's a nice idea for using LEGO blocks to compare numbers.

Playful learning with Lego math games. What a simple and fun way to learn math concepts Good idea for the EAs o use with kids

Here's a fun game for practicing comparing numbers.

Place Value Game

Place Value Game. I would add a few rows to get to the The kids could then write the number in standard, expanded and word forms. Could be good at beginning of the year, call it Place vAlue Mountain

Here's a fun idea for making a tool to use for comparing numbers.

Math Monsters make greater-than, less-than, and equal signs come to life; the monster faces the bigger number and the equal sign faces forward. Its a cute way to teach the concept.

Here's a farm themed game similar to war where students compare number cards. The player with the highest card wins both.

FREE Farm Math Station "Top It!" 2 students take turns pulling a card from the deck, higher number wins both cards.

Here's a set of 4 different posters to help students learn about the signs for greater than and less than.

Teacher's Pet - Greater Than / Less Than Posters - FREE Classroom Display Resource - EYFS, more than, smaller than, calulation

Fun game for practicing greater than and less than.

Maybe a math night game! Greater Than and Less Than activity that can be used in pairs or small groups. This hands on activity involves the students and makes them decide if the numbers they created are greater than, less than, or equal to each other.