Lap project

At an elementary school we have kids run laps for exercise tests.

I would like to put together a lap counter using an RFID reader and tags.

Can anyone suggest all the pieces I would need for this project?

I would guess the Reader (M6E Nano reader?), an antenna, USB adapter, cables, and Tags?

Remember this is not for exact profession marathon times. It’s just to track kids as they make their laps. Maybe put their times into a spreadsheet as they run by.

Any help would be great.

Thanks in advance.