400 Days Milestone
Day 400 · Over 13 months of busy little toddler adventures
Development at 400 Days
400 days - about 13 months! Your toddler is on the move and wants to do everything themselves. Words are coming faster now. This is peak explorer season: curious, fearless, into everything. Time to toddler-proof - they climb and reach a little higher every day.
Daily Care
At 400 days, most toddlers sleep 11-14 hours with 1-2 naps. Three meals plus snacks is the usual pattern, and self-feeding gets better daily. Tantrums may start - that's your little one wanting to be big. Keep safety top of mind now that they climb and reach everywhere.
400 days means you have a true toddler now. They have opinions - lots of them! Give them room to explore while keeping them safe. Some days bring tantrums, some bring wonders, often within the same hour. Be patient with them and with yourself, and enjoy the big personality.
Recommended Activities
Cultural Traditions
In many cultures, this stretch marks the shift from baby to toddler. It's when real independence and personality start to shine.
🎊 Celebrations
Many cultures celebrate the move into toddlerhood around this time. Around 400 days, little ones often join in more - and families start gentle, playful learning together.
Saving the Memories
📸 Photo Ideas
📝 Memory Tips
Film the toddling - wobbly, determined, and adorable. Record their words and the cute ways they say them. Catch that fearless curiosity on camera. And write a little about this stage: the tantrums, the triumphs, and the joy of watching them become their own person.