# Extras to buy beyond the stroller price Which add\-ons must be bought in addition to the stroller's listed price? Silver Cross Wave 2023: Says seven modes come out of the box and up to 30 are possible with accessories, with no extra purchase needed for the base double setup\. Snuggle Bugz describes the bassinet as sleep\-safe approved for newborns and the main seat as suitable from 6 months to 55 lb; sources disagree on the separately sold tandem seat's limit, with Snuggle Bugz and the store listing saying 55 lb and the video review saying 44 lb\. Bugaboo Kangaroo Family System \(PM007378; PV007712\): The newborn can ride high in the bassinet only after buying the upper newborn adapter; the sibling sits lower for stability\. Silver Cross Wave 2021: A second \(tandem\) seat and the toddler ride\-on board are not included and must be bought separately\. Bugaboo Donkey 6: The blog advises measuring your trunk and any unusually narrow doorway or lift before buying, and pricing the full mono, duo or twin setup rather than the starting price\. ### 1. [Silver Cross Wave 2023](/products/ucp/megababiesusa-com/7996685287678) (sold by megababiesusa\.com) Says seven modes come out of the box and up to 30 are possible with accessories, with no extra purchase needed for the base double setup\. - Base setup: Out of the box it starts as a single with an included bassinet and converts to a double with newborn and toddler seats, giving seven modes\. (guide) - Extra purchase: Snuggle Bugz describes the bassinet as sleep\-safe approved for newborns and the main seat as suitable from 6 months to 55 lb; sources disagree on the separately sold tandem seat's limit, with Snuggle Bugz and the store listing saying 55 lb and the video review saying 44 lb\. (blog) - Price basis: - ### 2. [Bugaboo Kangaroo Family System \(PM007378; PV007712\)](/products/ucp/megababiesusa-com/8626132910334) (sold by megababiesusa\.com) The newborn can ride high in the bassinet only after buying the upper newborn adapter; the sibling sits lower for stability\. - Base setup: The Family System bundle includes bassinet fabric, seat fabric and a sibling seat for two children\. (guide) - Extra purchase: The newborn can ride high in the bassinet only after buying the upper newborn adapter; the sibling sits lower for stability\. (review) - Price basis: - ### 3. [Silver Cross Wave 2021](/products/ucp/megababiesusa-com/6857963012249) (sold by megababiesusa\.com) A second \(tandem\) seat and the toddler ride\-on board are not included and must be bought separately\. - Base setup: It is a single stroller that converts to carry a newborn and a toddler with no extra purchase needed, thanks to the One plus One system\. (guide) - Extra purchase: A second \(tandem\) seat and the toddler ride\-on board are not included and must be bought separately\. (guide) - Price basis: - ### 4. [Bugaboo Donkey 6](/products/ucp/megababiesusa-com/9134828323070) (sold by megababiesusa\.com) The blog advises measuring your trunk and any unusually narrow doorway or lift before buying, and pricing the full mono, duo or twin setup rather than the starting price\. - Base setup: The store lists 33\.7 lbs single with seat, 35\.9 lbs single with bassinet, 42\.1 lbs double with bassinet and seat, 39\.8 lbs double/twin with two seats and 44\.4 lbs twin with two bassinets\. (listing) - Extra purchase: - - Price basis: The blog advises measuring your trunk and any unusually narrow doorway or lift before buying, and pricing the full mono, duo or twin setup rather than the starting price\. (blog) ## Also cited in the text - Silver Cross Wave 2023, configurations: Says seven modes come out of the box and up to 30 are possible with accessories, with no extra purchase needed for the base double setup\. (blog) Every value in the table is a fact RoboTrunk checked, linked to the page it came from\. A dash means no checked fact fills that cell\. Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live\. Written 2026-10-30T19:45:41.758Z. This page is published by RoboTrunk, a store built for shopping agents. The store named on this page sells the product and ships it. RoboTrunk is not the seller and never holds the money. Buying works in one path. RoboTrunk's tools prepare a checkout at that store, then hand back a short-lived link. The person approves the total; once RoboTrunk has checked the store's total against it, the person is given the checkout link to tap in their own browser, or, if the person prefers and gives permission, their agent may open the link and finish there, and payment always happens on the store's own checkout page. RoboTrunk never takes the payment or sees a card. 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