lakefront-autumn.jpg: Krzysztof Popławski — CC BY-SA 4.0 — https://commons.wikimedia.org/wiki/File:Pond_Stawiki,_pier_and_beach,_Sosnowiec.jpg
kids-river.jpg: Basile Morin — CC BY-SA 4.0 — https://commons.wikimedia.org/wiki/File:Children_playing_at_sunset_on_a_Mekong_bank_in_Si_Phan_Don.jpg
kids-fountain.jpg: Daniel Case — CC BY-SA 3.0 — https://commons.wikimedia.org/wiki/File:Woman_with_children_playing_in_fountain_on_Como_lakefront.jpg
kids-running.jpg: Jubair Ahmed Arnob — CC BY-SA 4.0 — https://commons.wikimedia.org/wiki/File:Childhood_Joy.jpg
family-rocks.jpg: mattbuck (category) — CC BY-SA 3.0 — https://commons.wikimedia.org/wiki/File:Brimham_Rocks_MMB_15.jpg
trees-sunlight.jpg: Dietmar Rabich — CC BY-SA 4.0 — https://commons.wikimedia.org/wiki/File:Dülmen,_Wildpark_--_2018_--_1417-21.jpg
hero-picnic.jpg: same file as family-picnic.jpg — Pexels (free license) — https://www.pexels.com/photo/family-out-on-a-picnic-7669144/