Looking at the Life Cycle section of the Wikipedia entry I can help clean that up a bit. I have copied and pasted the text here with the documentation or undocumented facts. Nearly all of this was paraphrased from the Kender Handbook from the kencyclopedia. Luckily much of that content made it’s way into the Races of Ansalon product so it’s official now. RoA is Races of Ansalon.
Kender have typical births — the mother has a 9 month pregnancy and usually has one child at a time.
[Unofficial www.kencyclopedia.com Kender Handbook]
An average kender mother will have three to five children in her lifetime
.[RoA138]
Kender names are chosen from a wide range of sources, such as corruptions of other words, like Cassel from Castle, or recent events or items in pouches, like Bearchase, Lockpick, Fruitthrow, etc.
[Recent Events and items foun din pouches is confirmed in RoA 139, but not the corruption of words portion, instead if has naming after an existing relative]
Infants mature at about the same rate as humans.
[Unofficial www.kencyclopedia.com Kender Handbook]
As children, they come to rely on family and friends for needs, and the main contributors to a young kender's growth are often called their grandparents, uncles and cousins, regardless of actual family ties.
[RoA138]
At around 4 or 5, "kenderkids" begin to take part in their communities and to constantly ask questions. While others may feel this stage in a child's life is the most annoying, it is seen by kender parents to be a beautiful stage in life. Some do not give proper answers, in order to further encourage the child's curiosity.
[The term “Kenderkin” is used in Chronicles Kenderkids is not official]
As they age, kender children gain education by hearing stories, desiring to acquire new skills, and playing games. They also begin handling and wandering.
[RoA 138/139]
Some kender volunteer themselves to keep the kenderkids amused, and are referred to as "Kender Wranglers." These people have fences and locks on their houses—not for security, but so that the children can climb and pick them if they want. Wranglers who watch over adolescent and teen-aged kender are called "Game Masters." As kender reach this age, not only do they seek out these Game Masters,
[Unofficial www.kencyclopedia.com Kender Handbook]
but they also become more active participants in "Kender Moots," social gatherings where the youth can show off their newly found skills in games and demonstrations. As they near adulthood, kender experience intense wanderlust and leave home.
[RoA 138]
Most spend their entire adult lives wandering around the world. Most of the population of Krynn has been exposed to the adult variety of kender, and as such have adapted the word kender to mean thief, rogue, or cutpurse. Kender take great offense to these epithets, especially the last.
[DoAT]
Otherwise, they build up close friendships during the wandering stage of their lives, at least with people who can understand and cope with them.
[Undocumented]
"Settling down" begins between the ages of 30 and 50 years old. This is a gradual process, whether the kender wonders what's happening back home and decides to go visit, or unconsciously wanders back. They may stay for a bit and then go back adventuring. Eventually the traveling will become shorter and the visits home longer until they return to their city for good and buy or build a home. Most kender find a mate during this stage and live together. They also start to informally choose professions and to pass on their talents to the next generation, possibly becoming parents, Game Masters or Kender Wranglers.
[Unofficial www.kencyclopedia.com Kender Handbook]
Kender age slowly and often do not realize it is happening, remaining childlike in comparison to other races even when their bodies slow down.
[Kender attitude has been referred to as “childlike” in many places, Tales of the Lance calls them a childlike race.”]
When kender die, it is traditional to give something meaningful to their spirit. Funerals are held, at which the people who knew them express their grief, but kender view death as the next great adventure, and don't linger too long on sadness. Kender are usually interred somewhere that was meaningful to them in life or as they died, or simply at a particularly nice spot.
[RoA 139]
Graveyards are uncommon, and in Hylo, a deceased kender's body is set sail on a burning raft rather than buried.
[Undocumented, in fact in Key of Destiny the Ruins of Kendermore have a graveyard.]