The first thing the parents especially moms should be teaching their kids is TAWHEED. These days people focus on teaching their kids ABCs, 123, animal names, nursery rhymes etc but they FAIL to teach them that which will save them from Hell fire - Tawheed. The Sahaaba (radiallaahu 'anhum) would teach their children to say the kalima 'La illaaha il-Allaah' as soon as the children began to pronounce words, even before the AGE OF TWO. Umm Sulaim (radiallaahu 'anha) would teach her son Anas (radiallaahu 'anhu), saying: "Say: 'Laa illaaha il Allaah (none has the right to be worshipped in truth except Allaah).' Say: 'Ash-hadu anna Muhammad Rasul-ullaah (I bear witness that Muhammad is the Messenger of Allaah).'" This was BEFORE the age of weaning [Siyar A'laam an-Nubalaa (2/305) So u should be teaching Tawheed even before the age of TWO sisters. Some tips on how u can Tawheed to ur toddler age & above: 1. Repeat to them the Kalimah La ilaha il Allah Muhammad ur Rasool Allah right from the day they are born all the time until they can pronounce it (doesnt matter if they dont pronounce it correctly as toddlers have limited speech skils) 2. Teach them Tawheed ar Ruboobiyyah - teach them that Allah is our Creator, the Only One. Tell them Allah Subhaana wa ta'aala created everything. Ask them who created you? Ur mum ,dad? Siblings? the animlas? Teach its Allah Subhaana wa ta'aala who created everything. When they look at the Sun or stars tell them its Allah who Created everything. Make them focus on big & small creations. Even the ant & apple, tell them Allah created it. This makes them realise that EVERYTHING is created by Allah. 3. Teach them Tawheed al Uloohiyyah - teach kids that we worship only Allah Subhaana wa ta'aala we only ask Him for help. When u pray Salaah & kids imitate to u teach them we are praying only to Allah. When ur child needs something for example if a toddler is crying for a new toy teach them to make dua & ask Allah Subhaana wa ta'aala even for the smallest things. If they want a lolly even for that teach them to ask Allah. Ayesha (radi Allahu anha) said: Ask Allaah for everything, even shoelaces, because if Allaah does not make it easy for you to obtain it you will not obtain it.” [Narrated by Abu Ya’la (8/44) and Ibn al-Sunni in ‘Aml al-Yawm wa’l-Laylah (349)] 4. Teach ur child Tawakkal to rely upon Allah for everything - when ur chilld is scared or worried them dont tell them "Im here or ur dads here dont worry' teach them Allah is with u. Hes the Best Protectors. He will look after u. This wil teach ur child to rely upon Allah rather than you or any other human being. Even if u die or ur sick & ur child is lonely, they will learn to rely on Allah and trust Him. When ur child is worried tell them Allah will make things better. When ur child is sick teach them to turn to Allah to make dua to him & ask Him for shifa. 5. Teach them Tawheed al Asma wa Sifaat- teach ur kids Names & Attributes of Allah Subhaana wa ta'aala from an early age. Ask them where is Allah point to the Sky tell them Allah is Up- the Most Hight, above the Heavens. When it rains teach them the Sunnah of letting rain touch ur body & that the rain has just come from Allah. When a child is naughty tell them Allah is Watching them that He sees all. Always remind that even if ur not there Allah is with them in His Knowledge. If they throw a tantrum or become angry tell them that Allah Hears them. If ur child is being impatient tell them Allah loves those who are patient. When u take ur child to the beach or when they see rainbow tell them Alllah is the Artist He desgined everything. When ur sick tell ur child to make dua to Allah to heal thier parents or grandparents etc. Tell them Allah is Ash Saafi the healer. Remember the happiest people are the people of Tawheed so if u want ur child to be content & happy both in dunya and akhirah teach them Tawheed right from day one.