Looking for my 14yo brother to earn some money

Hi, I only just recently found out about r/beermoney and it seems like a chill community at times, so let's get into it. He's been trying to save for a pc for awhile now, I already have one myself and that was just from saving for a few years, roughly £5 a week and it costed about £1100. Is there anything he can do to earn money?