I know this may be out of left field, but this is my feel good/little time playlist. It is not kids music at all, but it is happy music to me. Some of these songs are really silly but fun. It makes me smile and feel dancey. If it's not at all what you are wanting, I apologize.
Alt-J - Breezeblocks
Atlas Genius - Trojans
Awolnation - People
Bag Raiders - Shooting Stars
Bag Raiders - Sunlight
Billie Eilish - ocean eyes
BØRNS - 10,000 Emerald Pools
CHVRCHES - Gun
CHVRCHES - The Mother We Share
Capital Cities - Love Away
Capital Cities - Origami
Classixx - A Stranger Love
Classixx - Safe Inside
Death Cab For Cutie - I Will Possess Your Heart
Empire Of The Sun - High And Low
Empire Of The Sun - Way To Go
Empire of the Sun - Alive
Empire of the Sun - I'll Be Around
Empire of the Sun - Standing on the Shore
Empire of the Sun - Walking on a Dream
For The Foxes feat. Allison Weiss - Running Back to You
Foster The People - I Would Do Anything for You
Foster the People - Coming Of Age
Incubus - Are You In?
Incubus - I Miss You
Incubus - Stellar
Katy Perry - Firework
Local Natives - Wide Eyes
Lorde - A World Alone
Lorde - Team
M83 - Midnight City
M83 - New Map
MGMT - Kids
MGMT - Time to Pretend
Miike Snow - Paddling Out
Miike Snow - Silvia
Miike Snow - The Wave
No Doubt - Different People
No Doubt - Sunday Morning
Phoenix - Too Young
Passion Pit - Carried Away
Passion Pit - Let Your Love Grow Tall
Passion Pit - Little Secrets
Passion Pit - Sleepyhead
Passion Pit - Swimming In the Flood
Phoenix - Fences
Phoenix - If I Ever Feel Better (Origin
Powers - Hot
Powers - Loved By You
The Knocks feat. Powers - Classic
Silversun Pickups - All The Go Inbetweens
Silversun Pickups - Dream At Tempo 119
Silversun Pickups - Latchkey Kids
Silversun Pickups - Lazy Eye
Silversun Pickups - Little Lover's So Polite
Silversun Pickups - Substitution
Sixpence None The Richer - Kiss Me
Smashing Pumpkins - Stand Inside Your Love
Smashing Pumpkins - With Every Light
Strange Talk - Cast Away
Strange Talk - Climbing Walls
Strange Talk - Picking Up All the Pieces
Tame Impala - Let It Happen
Tame Impala - The Less I Know The Better
The All-American Rejects - Move Along
The Naked And Famous - Hearts Like Ours
The Naked And Famous - Rolling Waves
The Naked and Famous - Punching in a Dream
The Postal Service - Brand New Colony
The Postal Service - Sleeping In
The Smashing Pumpkins - Let Me Give the World to You
The xx - Crystalised
Walk the Moon - Anna Sun
Walk the Moon - Shiver Shiver
Yeah Yeah Yeahs - Soft Shock