CC Ādi 15.32

paugaṇḍa vayase līlā bahuta prakāra
vṛndāvana-dāsa ihā kariyāchena vistāra
Word for word: 
paugaṇḍa vayase — in His early age; līlā — pastimes; bahuta prakāra — of various kinds; vṛndāvana-dāsa — Vṛndāvana dāsa Ṭhākura; ihā — this; kariyāchena — has done; vistāra — the elaborate explanation.
Translation: 
The Lord performed many varieties of pastimes in His early age, and Śrīla Vṛndāvana dāsa Ṭhākura has described them elaborately.