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The Lemon Secret | Invisible Ink Science Song for Kids

◷ 2:35

Follow a lemon-juice treasure map as its dried lines become almost invisible, then turn brown with careful warming. This catchy science song explains that the juice marks remain on the paper and change with heat. Only an adult handles the iron while the child watches from a safe distance.

Text from the recording’s subtitles.

Song lyrics
Quel secret serpente sur la feuille ? Je presse un citron dans un petit bol Je trempe un coton-tige dans le jus Je trace la carte du trésor en papier Les traits mouillés brillent, puis ils sèchent L’eau s’évapore, les marques restent La chaleur révèle la trace de citron Elle brunit plus vite que le papier Les chemins cachés reviennent au jour La croix nous mène jusqu’au trésor Le papier sec paraît presque vide Un adulte le couvre d’une autre feuille Puis il chauffe les deux au fer avec soin De loin, je vois les premiers traits paraître La chaleur révèle la trace de citron Elle brunit plus vite que le papier Les chemins cachés reviennent au jour La croix nous mène jusqu’au trésor Aucune peinture brune n’était cachée Alors se produit un changement chimique Courbes et flèches se rejoignent à la croix La chaleur révèle la trace de citron Elle brunit plus vite que le papier Les chemins cachés reviennent au jour La croix nous mène jusqu’au trésor La croix indique un cadeau en papier La chaleur montre les traces séchées du jus
Language version lyrics
What secret twists across this page? I squeeze lemon drops into a bowl I dip a cotton swab in the juice And draw a map to a paper treasure Wet lines shimmer, then they dry As water evaporates, juice marks stay Gentle heat reveals the lemon trail It browns faster than the paper Hidden roads come back in sight The X points us toward the treasure The dry page looks almost blank An adult covers it with a clean sheet Then warms both gently with an iron I watch from a safe spot; lines appear Gentle heat reveals the lemon trail It browns faster than the paper Hidden roads come back in sight The X points us toward the treasure No brown paint was hiding on the page Warming causes a chemical change Brown bends and arrows meet at X Gentle heat reveals the lemon trail It browns faster than the paper Hidden roads come back in sight The X points us toward the treasure At X, a paper surprise awaits Warmth revealed the dried juice marks
Open on YouTube ↗
2:34
Audio language: EnglishSongs

The Lemon Secret | Invisible Ink Science Song for Kids

Follow a lemon-juice treasure map as its dried lines become almost invisible, then turn brown with careful warming. This catchy science song explains that the juice marks remain on the paper and change with heat. Only an adult handles the iron while the child watches from a safe distance.

Chemistry↗
3:13
Audio language: EnglishSongs

How Does a TV Make a Fish Move? A Kids’ Song

Maja turns on the TV and wonders how a fish can swim across the screen—and where its splash comes from. This song explores how a signal guides pixels and speakers, how changing still pictures appear to move, and how a vibrating speaker moves the air to make sound.

Technology↗