This guide for those of you who need some help when looking for certain objects.
How To Found All Items
Video Guide
All Hidden Items By Levels
Level 1 - T-Rex AttackLevel 2 - Village
Level 3 - GatheringLevel 4 - Rock Expo
Level 5 - ZooLevel 6 - Hunting Party
Level 7 - Small MarketLevel 8 - The Beach
Level 9 - Wrath Of Anubis
Level 10 - The Judgement Of Osiris
Level 11 - Queen's BirthdayLevel 12 - The Great Pyramid
Level 13 - The City
Level 14 - Royal Wedding
Level 15 - DungeonLevel 16 - Market Place
Level 17 - Ambush
Level 18 - Stone Henge
Level 19 - Jousting Tournament
Level 20 - Castle AttackLevel 21 - Train Station
Level 22 - The BankLevel 23 - Native Attack
Level 24 - Western TownLevel 25 - The Gold Rush
Level 26 - The Native Village Source: https://gameplay.tips/guides/7048-hidden-through-time.html