Louvre Museum Day

Hi! We are traveling in June/July to Paris, and we are planning to go to Louvre on July 2. We are a family of 5 (3 kids aged 14,8 and 5). Do you recommend a tour guide specifically for families with small kids or just do one with no tour guide? And what website do you usually use to purchase tickets? We aren’t planning to do a big Louvre museum day. Just to see a few pantings. Probably an hour or 2. Thank you